Touch sensor-integrated display device
a display device and sensor technology, applied in the field of touch sensor integrated display devices, can solve the problems of vertical electric field type, overlap between metal lines and color filters, affecting display quality, etc., and achieve the effect of preventing a reduction in aperture ratio and being easy to conn
Active Publication Date: 2018-07-10
LG DISPLAY CO LTD
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
This configuration prevents a reduction in aperture ratio and facilitates easy connection of metal lines to the necessary ICs, enabling the successful implementation of a vertical electric field type touch sensor-integrated liquid crystal display device.
Problems solved by technology
However, the use of the above input devices requires the user to learn how to use them and involves inconvenience like the space occupied by them.
However, the above-described related art horizontal electric field type touch sensor-integrated liquid crystal display device has the problem that a common electrode is formed on a thin film transistor array TFTA and is therefore not applicable to a vertical electric field type touch sensor-integrated liquid crystal display device.
First, when segmenting a common electrode formed on the color filter array CFA and using the segments of the common electrode as common electrodes for the display operation and touch electrodes for the touch operation, a low-resistance metal line needs to be connected to each of the segments (i.e., touch electrodes) of the common electrode in order to supply a common voltage or a touch driving voltage. The metal line connected to each of the segments of the common electrode needs to extend from a display area (active area) to a non-display area (bezel area) outside the display area. Accordingly, any overlap between the metal line and color filters lowers aperture ratio and display quality.
Second, since horizontal electric field type liquid crystal display device is configured in such a way that the segments of the common electrode and metal lines connected to the segments are formed in the thin film transistor array, there was no particular problem with connecting a source driver IC (integrated chip) for the display operation to a touch IC for the touch operation. On the other hand, the vertical electric field type liquid crystal display device is configured in such a way that the segments of the common electrode and metal lines connected to the segments are formed in the color filter array and a source driver IC (integrated chip) for the display operation and a touch IC for the touch operation are formed in the thin film transistor array. As the color filter array and the thin film transistor array are disposed to face each other with the liquid crystal layer interposed between them, it was difficult to connect the metal line formed in the color filter array to the source driver IC and touch IC formed on the thin film transistor array.
Method used
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[0036]Hereinafter, a vertical electric field type touch sensor-integrated liquid crystal display device according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings. Throughout the specification, the same reference numerals indicate the same components.
[0037]First of all, a touch sensor-integrated display device according to an exemplary embodiment of the present invention will be described with reference to FIG. 2. FIG. 2 is a partial exploded perspective view schematically showing a touch sensor-integrated display device according to an exemplary embodiment of the present invention.
[0038]Referring to FIG. 2, the touch sensor-integrated display device according to the exemplary embodiment of the present invention includes a liquid crystal display panel LCP having a thin film transistor array TFTA and a color filter array CFA which are disposed with a liquid crystal layer interposed between them.
[0039]The thin ...
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Abstract
A touch sensor-integrated display device is provided which does not suffer from a reduction in aperture ratio. The touch sensor-integrated display device includes first and second substrates, color filters that are defined by a black matrix in the active area of the second substrate and arranged in a first direction and a second direction crossing the first direction, touch electrodes that are arranged in the first and second directions so as to overlap the color filters, and a plurality of routing wires that are arranged on the black matrix and are respectively connected to the touch electrodes and extend to the bezel area.
Description
[0001]This application claims the benefit of priority under 35 U.S.C. ยง 119(a) to Korean Patent Application No. 10-2014-0059866 filed on May 19, 2014, which is incorporated herein by reference for all purposes as if fully asset forth herein.BACKGROUND OF THE INVENTION[0002]Field of the Invention[0003]The present disclosure relates to a touch sensor-integrated display device, and more particularly, to a touch sensor-integrated liquid crystal display device which is suitable as a display device driven by a vertical electric field.[0004]Discussion of the Related Art[0005]Various input devices, such as a keyboard, a mouse, a trackball, a joystick, a digitizer, and the like, are used to configure an interface between a user and home appliances or various information communication devices. However, the use of the above input devices requires the user to learn how to use them and involves inconvenience like the space occupied by them. Accordingly, there is a growing demand for input device...
Claims
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IPC IPC(8): G06F3/041G06F3/044G09G3/36G02F1/1335G02F1/1333
CPCG02F1/13338G09G3/3648G06F3/0412G06F3/044G02F1/133512G06F3/0445G02F1/133345G02F1/133514G02F1/134336G02F1/136209G02F1/136286G06F3/0416
InventorLEE, DEUKSUJUNG, JIHYUNKIM, TAEYUN
OwnerLG DISPLAY CO LTD